Abstract
In order to study the influence of the traffic characteristics on traffic accidents in extra long tunnel, the main measurement indicators of traffic flow during the time of traffic accidents are matched with the accident information to form a data set of the number of traffic accidents and the hourly traffic flow of the accident. Vehicle ratio and the number of accidents are mainly used as the characteristic indicators of traffic flow. At the same time, the longitudinal distribution law of the average speed of traffic flow and the number of traffic accidents in the extra long tunnel is studied. Based on the superposition principle, the extra long tunnel is divided into 5 traffic safety zones. This paper analyzes the distribution of time, morphology, cause of accident, and other characteristics in different traffic safety zones, finding that the shape of traffic accidents in extra long tunnel is mainly rear-end collisions. Improper operation and illegal lane changes are the main causes of accidents.
Highlights
China has the largest number of tunnel projects, the most complicated conditions, and the fastest technological development in the world [1]
This paper focuses on analyzing the correlation between the number of traffic accidents and traffic flow characteristics and longitudinal position of the extra long tunnel
Entrance Entrance section Middle section Exit section transition section Tinnel longitudinal position traffic accidents caused by improper operation and other safety incidents in tunnel entrance section was higher, that accounts for 6.81% and 14.29% of the total number of tunnel traffic accidents respectively; in the middle of the tunnel, the proportion of traffic accidents caused by illegal lane change was relatively high as well, accounting for 3.40% of the total number of tunnel traffic accidents; The proportion of traffic accidents was low, accounting for 0.68% of the total number of tunnel traffic accidents
Summary
China has the largest number of tunnel projects, the most complicated conditions, and the fastest technological development in the world [1]. In China, by the end of 2018, there were 17,738 road tunnels with a total of 17.2361 million meters long, wherein 1058 tunnels were extra long tunnels with a total of 4,706,600 meters [2]. With the increasing mileage of tunnels, tunnel traffic safety problems have become increasingly apparent, and road tunnels have become. The tunnel-related research results rarely involve the longitudinal distribution of traffic flow and traffic accidents in long tunnel. Zhou Jingjing [3] studied the correlation between the distribution of tunnel accident sections and the characteristics of the tunnel environment. Yeung et al [4] studied the spatial distribution characteristics of the degree. This paper focuses on analyzing the correlation between the number of traffic accidents and traffic flow characteristics and longitudinal position of the extra long tunnel
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